Unstructured data refers to information that doesn't have a predefined format or organization, making it difficult to analyze using traditional methods. Examples include text from social media posts, emails, images, and videos. Unlike structured data, which is neatly organized in tables and databases, unstructured data is more free-form and can contain valuable insights if processed correctly. This type of data is increasingly important in today's digital world, as it represents a vast majority of the information generated. Companies like Google and Amazon use advanced techniques, such as machine learning, to extract meaningful patterns from unstructured data, helping them improve services and understand customer behavior.